Non-contact Carrier System using
Solar Magnetic Suspension

Control Engineering Laboratory
Graduate School of Science & Engineering, Saitama University
Background

Apparatus

Basic technology

Magnetic suspension units

Solar photovoltaic
No motion
No operation cost
No fuel consumption
West gas less
Recently Low cost Higher efficiency

Zeropower magnetic suspension (EMS)
Zero coil current in steady state
Low consumption power
Non-contacted suspension

Solar cells

Magnetic suspension carrier
Guide rail with magnetic coil

Magnetic suspension carrier

No external power supply for the carrier

mass of 2.1kg

Long term non-contact characteristics

Displacement sensor

A lot of magnetic coil along the rail

Magnetic coils on the carrier

Magneticsuspension units

RailMimimum number of magnetic coils
Rail is simple structured
Conttacted external power supply to the carrier

Hybrid magnet

PowerAMP.

Pantograph, Trolley Contacted power supply
Battery Contacted for charging

PowersupplyController

Contactless power supply using solar cells

StoragedeviceSolar magnetic suspension carrier system for indoor

Suspension

Signal line

Solar cells

Low Installation costs ,Long term contactless characteristics
Problems: Solar cells generates low power under indoor
Magnetic suspension carrier needs low consumption

RailPower line

Driven the carrier by a sloping propulsion mechanismCarrierLight source
Reference
Fabrication of non-contact carrier system using solar magnetic suspension
Mechanical Engineering Journal, Vol. 2 (2015.8), No. 4, p. 15-00143

Flow diagram

Z axis15200
100Control stop

246810Voltage [V]1214Controller

Voltage
SensorVoltage
SensorControl flag

Output voltage

Power supply circuit

50123
Time [day]45Power characteristics in steady stateTime characteristics during 5days

Solar cells can generate 340mW in maximum
The carrier consumed 180mW in mimimum

The generated power uses for suspension with charging.
The carrier was supplied by only charged battery during 44h.

The consumed power of peripheral devices were reduced.

Summary
A power-saving non-contacted carrier system using solar
magnetic suspension was fabricated.
On board solar cells generates 340[mW] max. under 10klx.
The carrier consumes < 280[mW] in the steady-state.

0.8Power [W]

VoltageSensor

1000

Solarcells
Battery300DummyloadCapacitors

Only battery

Generated power
Consumed power

Voltage [V]Power [mW]

400

Applying illuminanceWith battery charge

Displacement[0.5mm/div]

Experimental result

Output for
DC stabilizing peripheral devices
power supply
Output for AMP.

0.6
0.4

The remaining power is consumed for battery charge or dummy load.

0.2

Approximately same as a white high luminous LED consumed.

0Time [1s/div]

The carrier was levitated during 5 days.
A driving mechanism for the carrier was fabricated.

Displacement[0.05mm/div]

Yuji ISHINO, Masaya TAKASAKI, Takeshi MIZUNO, Fabrication of non-contact carrier system using
solar magnetic suspension, Mechanical Engineering Journal, Vol. 2 (2015.8), No. 4, p. 15-00143
Yuji Ishino. Takeshi Mizuno, Masaya Takasaki, Masayuki Hara, Daisuke Yamaguchi: Development ofNon-contact Carrier System using Solar Magnetic Suspension (3ed report: Continuous 5-day andinstallation of sloping propulsion mechanism), Proceedings of the 10th Asian Control Conference 2015
(ASCC 2015) , pp.773-778(2015.6. 3)
Yuji ISHINO, Masaya TAKASAKI, Takeshi MIZUNO, Fabrication of Non-contact Carrier System using
Solar Magnetic Suspension, proceedings of 14th International Symposium on Magnetic Bearings(ISMB14), pp.487-490, (2014.8.13)

Time [1s/div]

Time characteristics in the steady state
Reference
Fabrication of non-contact carrier system using solar magnetic suspension
Mechanical Engineering Journal, Vol. 2 (2015.8), No. 4, p. 15-00143

Acknowledgment
This work was supported by JSPS KAKENHI Grant Number
25420177.

Access:255 Shimo-Okubo, Sakura-ku, Saitama,338-8570 Saitama Univ. Control Engeneering lab.
Professor:T.Mizuno(mizar mech.saitama-u.ac.jp)
TEL:048-858-3453/FAX:048-856-2577 URL:http://control.mech.saitama-u.ac.jp/home-j.html

Cntro
engineering Lab.